Nissan Maxima Service and Repair Manual: U1243 display unit

Nissan Maxima Service and Repair Manual / Driver information & multimedia / Audio, visual & navigation system / DTC/circuit diagnosis / U1243 display unit

Description

Part name  Description 
DISPLAY UNIT 
  • Display image is controlled by the serial communication from AV control unit.
  • Inputs the RGB image signal (RGB, RGB area and RGB synchronizing) from AV control unit and the auxiliary image signal from the auxiliary input jacks.
  • Outputs the synchronizing signals (HP and VP) to the AV control unit 

DTC Logic

Nissan Maxima. DTC Logic

Diagnosis Procedure

1.CHECK DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUIT

Check display unit power supply and ground circuit

2.CHECK CONTINUITY OF COMMUNICATION CIRCUIT

Nissan Maxima. CHECK CONTINUITY OF COMMUNICATION CIRCUIT

  1. Turn ignition switch OFF.
  2. Disconnect display unit connector and AV control unit connector.
  3. Check continuity between display unit harness connector M141 (A) terminals 11, 22 and AV control unit harness connector M154 (B) terminals 56, 44.
  4. Check continuity between display unit harness connector M141 (A) terminals 11, 22 and ground.

Nissan Maxima. CHECK CONTINUITY OF COMMUNICATION CIRCUIT

Nissan Maxima. CHECK CONTINUITY OF COMMUNICATION CIRCUIT

3.CHECK COMMUNICATION SIGNAL

Nissan Maxima. CHECK COMMUNICATION SIGNAL

  1. Connect display unit connector and AV control unit connector.
  2. Turn ignition switch ON.
  3. Check signal between display unit harness connector M141 terminal 11 and ground with an oscilloscope or CONSULT.

Nissan Maxima. CHECK COMMUNICATION SIGNAL

4.CHECK COMMUNICATION SIGNAL

Nissan Maxima. CHECK COMMUNICATION SIGNAL

Check signal between display unit harness connector M141 terminal 22 and ground with an oscilloscope or CONSULT.

Nissan Maxima. CHECK COMMUNICATION SIGNAL

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